Synthetic navel orangeworm pheromone composition and methods relating to production of same

ABSTRACT

One or more embodiments of the invention are directed to the synthetic methods for making lepidopteran pheromones including navel orangeworm pheromones. The synthetic methods involve novel, efficient, and environmentally benign steps and procedures.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.13/372,288, filed Jun. 7, 2012, which is a continuation of U.S. patentapplication Ser. No. 12/763,589, now U.S. Pat. No. 8,115,035, filed Apr.20, 2011, which is a continuation of U.S. patent application Ser. No.12/255,951, now U.S. Pat. No. 7,737,306, filed Oct. 22, 2008, thecontents of which are hereby incorporated by reference in theirentirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

One or more embodiments of the invention relate to compositions andmethod for synthesizing the navel orangeworm pheromones and methods forusing thereof for pest management.

2. Description of the Related Art

As the need for food production in the world grows so does the need fornew forms of pest control. The increasing use of conventional pesticidesleads to resistant pests, severely alters the natural ecology, anddamages the environment. This problem has led to innovative ways in pestmanagement without the use of pesticides. One of the ways that has beenpresented is the use of insect sex pheromones (Shani, A., “Integratedpest management using pheromones,” Chemtech 28(3), pp. 30-35 (1998)).

Sex pheromones are used in the chemical communication of many insectsfor attracting the species of the opposite sex to engage inreproduction. Pheromones are useful for pest control largely throughfour means: monitoring, mass trappings, attract and kill, and disruptionof communication or confusion. “Monitoring” methodology attracts thepests to a central area, which allows the grower to obtain preciseinformation on the size of the pest population in order to make informeddecisions on pesticide use or non-use. “Mass trappings” brings the pestto a common area and physically trap them, which hinder production ofnew generations of pests. “Attract and kill” allows the pests to bedrawn into a centrally located container and killed in the container bythe pesticide reducing the need to spread pesticides in broad areas.“Disruption of communication” can occur in that a large concentration ofsex pheromone can mask naturally occurring pheromones or saturate thereceptors in the insect causing confusion and disruption of naturalreproductive means (Shani, 1998). For each one of these means, eachindividual species of pest needs to be treated with a tailor-madecomposition which can add substantially to the cost in creating a bulkamount.

Pheromones are considered relatively non-toxic, not environmentallypersistent (decompose quickly in nature), and do not create resistanceby pests. These qualities make them a superior choice as an alternativeto pesticides. Because of the need for more environmentally friendlypest management, the industry has emphasis to develop more efficient andcost-effective production methods for the pheromones while utilizingmore environmentally benign methods for their production.

One of the more pervasive pests in agriculture areas of tree-nutproduction is the larval worm of the moth family Lepidoptera: classPyralidae known as the Navel Orangeworm, Amyelosis transitella. Thetree-nut industry is a multi-billion dollar industry but estimates showonly 1% of the cultivated land uses pheromones for pest control (Shani,1998). With a relatively high cost for producing the pheromones, theeconomic impact creates a strong need to create an efficient method toproduce the sex pheromone of the navel orangeworm.

One of the major sex pheromone of the navel orangeworm has been isolatedand analyzed is (Z,Z)-11,13-hexadecadienal (HDAL). This pheromone andothers have been described in studies and belongs in the Ando type Ipheromones (Ando T. et al., “Lepidopteran sex pheromones,” Top Curr Chem239: 51-96, 2004). HDAL has been shown in other studies to have a highaffinity for binding to a major pheromone binding protein (AtraPBP)which can correlate to having some effect on the mating disruption andmonitoring of the adult moths (Leal et al., “Unusual pheromone chemistryin the navel orangeworm: novel sex attractants and a behavioralantagonist,” Naturewissenshaften 92:139-146 (2005)).

A method of synthesis for HDAL was described in a 1980 publication thatdescribed an at least seven step method (Sonnett, P. E. and R. R. Heath,“Stereospecific synthesis of (Z,Z)-11,13-hexadienal, a Female SexPheromone of the Navel Orangeworm, Amyelosis transitella,(Lepidoptera:Pyralidae)” Journal of Chemical Ecology, 6,221-228, 1980).U.S. Pat. Nos. 4,198,533 and 4,228,093 describe similar seven or morereaction step methods. Some of the problems faced by industry in theprocess of making pheromones, include use of toxic reagents, lack ofavailable refined starting materials on the market, and inefficienciesin the processes. There is need for new and better methods forsynthesizing the navel orangeworm pheromones.

To the best of knowledge known at the time of the patent application,the improved methods herein for creating a synthetic composition of thenavel orangeworm pheromone for use in pest management have not beendescribed.

BRIEF SUMMARY OF THE INVENTION

One or more embodiments of the present invention are novel and improvedmethods for synthesizing a sex pheromone of the navel orangeworm using areduced number of the presently used seven synthetic steps. Among otherbenefits these novel pheromone synthetic routes have improved stabilityof reactants and intermediates.

Accordingly one or more embodiments of the invention provide methods forforming various intermediates and final products including a startingmaterial such as a halo substituted alkyl alcohol. From this startingmaterial, a step includes forming a halo substituted alkanal. Anotherstep includes forming a halo substituted dialkoxy substituted alkyl.Another step includes forming a dialkyloxy substituted alkynyl. Yetanother step includes forming a halo substituted alkynyl. Another stepincludes forming dialkoxy substituted diynyl. A final step includesforming the final pheromone.

In other embodiments of the invention provides for methods of reactingthe intermediate products to form the final pheromone product. The stepon the starting material is an oxidation to form the next intermediateproduct. Another step is an O-alkyl-C-alkoxy addition that forms thenext intermediate product. Another step is an alkynyl-de-halogenation toform the next intermediate product. Yet another step is a halogenationto form the next intermediate product. Another step is performing acycle of oxidative addition and reductive elimination to form the nextintermediate product. And the final step is a reduction and hydrolysisto form the cis-cis isomer of the pheromone.

Other embodiments of the invention provide for methods of forming the(Z,Z)-11,13-hexadecadienal, utilizing intermediate products in less thanseven steps. The starting material in this embodiment utilizes10-chlorodecan-1-ol. The next step utilizes 10-chlorondecanal. Anotherstep utilizes 10-chloro-1,1-diethoxydecane. Another step utilizesbut-1-yne. Yet another step utilizes both 12,12-diethoxydodec-1-yne and1-bromobut-1-yne. Another step utilizes 16,16-diethoxyhexadeca-3,5-diyneto form the final pheromone.

Other embodiments of the invention provide for methods of forming the(Z,Z)-11,13-hexadecadienal utilizing various reagents. Accordingly,these reagents sodium bromide, sodium acetate,2,2,6,6-tetramethylpiperidinooxy (TEMPO), ethyl acetate, and sodiumhypochlorite are used on the starting material for the first step. Thenext step utilizes p-toluenesulfonic acid monohydrate andtriethylorthoformate to form the next intermediate product. Another steputilizes reagents lithium acetylide, ethylenediamine complex and sodiumiodide in dimethylsulfoxide to form another intermediate product.Another step utilizes reagents potassium hydroxide in water additionallywith bromide to form a reactant. Yet another step includes hydroxylaminehydrochloride, copper (I) chloride in methanol and added to withn-propylamine to form yet another intermediate product. And the finalstep utilizes reagents of cyclohexene and borane-N,N-diethylanilinecomplex (DEANB) in tetrahydrofuran, glacial acetic acid and eitheraqueous sulfuric acid or metal tetrafluorborate complexes.

Other embodiments of the invention provide for forming the stableversion of the navel orangeworm pheromone (Z,Z)-11,13-hexadecadienal byutilizing a method of less than six synthetic steps. Similarly, theembodiment provides a method for performing an oxidation on a startingmaterial preferably 10-chlorodecan-1-ol to form the aldehyde. Anotherstep protects the aldehyde by utilizing a C-alkyoxy O-alkyl additionprocedure. From this intermediate product, the compound is reacted witha terminal alkyne preferably 1,3-hexadiyne that was optionally formedfrom an internal alkyne such as 2,4-hexadiyne by use of a nucleophilicaddition to form the next intermediate product,16,16-diethoxyhexadeca-3,5-diyne. This compound then undergoes a furtherreaction in the method to stereospecifically reduce the diyne moiety andde-protect the aldehyde to create the final pheromone. It iscontemplated not using the optional step of forming the terminal alkynebut utilizing a commercially available compound allowing for a method ofless than five synthetic steps.

The embodiments of the invention provide for steps utilizing reagents ofalkali metal amides such as sodium amide in an ether to optionallyrearrange the internal alkyne to a terminal alkyne and to form the nextintermediate product.

Another embodiment of the invention provide for a synthesis kit thatutilizes all synthetic reagents, starting materials, methods, andapparatuses for forming the (Z,Z)-11,13-hexadecadienal, navel orangewormsex pheromone.

These and other embodiments of the present invention will readily occurto those of ordinary skill in the art in view of this disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features and advantages of the inventionwill be more apparent from the following more particular descriptionthereof, presented in conjunction with the following drawings wherein:

FIG. 1 is the outlined reaction scheme of the synthetic method formaking the navel orangeworm sex pheromone. After step B, the reactionscheme diverges into two alternative pathways. The numbers inparentheses designate the formula directly adjacent to it. The lettersin parentheses designate the reaction step to which the arrows connote.

FIG. 2 is the outlined reaction scheme of the synthetic method shown inFIG. 1 Pathway I also named Scheme 1a.

FIG. 3 is the outlined reaction scheme of the synthetic method shown inFIG. 1 Pathway II also named Scheme 1b.

FIG. 4 is the GC chromatograph of the Example 1 compound 7(Z,Z)-11,13-hexadecadienal.

FIG. 5 is the GC chromatograph of a reference standard(Z,Z)-11,13-hexadecadienal.

FIG. 6 is a schematic diagram of an oxidative addition and reductiveelimination reaction.

FIG. 7 is a synthetic scheme for Example 1.

DETAILED DESCRIPTION

A synthetic pheromone composition will now be described. In thefollowing exemplary description numerous specific details are set forthin order to provide a more thorough understanding of embodiments of theinvention. It will be apparent, however, to an artisan of ordinary skillthat the present invention may be practiced without incorporating allaspects of the specific details described herein. In other instances,specific features, quantities, or measurements well known to those ofordinary skill in the art have not been described in detail so as not toobscure the invention. Readers should note that although examples of theinvention are set forth herein, the claims, and the full scope of anyequivalents, are what define the metes and bounds of the invention.

The practice of the present invention will employ unless otherwiseindicated conventional methods of chemistry within the skill of the art.Such techniques, methods, reactions, and the like are explained fully inthe literature such as Advanced Organic Chemistry: Reactions,Mechanisms, and structure, Ed. Jerry March 4th ed. (New York, John Wileyand sons, 1985) and Techniques and Experiments for Organic Chemistry,Addison Ault, 5th ed. (University press, 1998).

All publications and patents and patent applications cited herein arehereby incorporated by reference in their entirety.

As used in this specification and in the appended claims, the singularforms “a,” “an” and “the” include plural references unless the contentclearly dictates otherwise.

The use of the word “preferably” in its various forms is for ease ofreading and should not be used to read into the claims anything more.

In describing the invention and embodiments, the following terms will beemployed and are intended to be defined as indicated below. If any termsare not fully defined, then the normal usage as used in the art willfill any gaps in the understanding of the terminology.

The term “substitution” is a replacement of an atom or group of atoms ina moiety by another atom or group of atoms.

The term “substituted” means that the specified group or moiety bearsone or more substituents. The term “unsubstituted” means that thespecified group bears no substituents. The term “optionally substituted”means that the specified group is unsubstituted or substituted by one ormore substituents. It is to be understood that in the compounds of thepresent invention when a group is said to be “unsubstituted,” or is“substituted” with fewer groups than would fill the valencies of all theatoms in the compound, the remaining valencies on such a group arefilled by hydrogen. For example, if a terminal ethyl group issubstituted with one additional substituent, one of ordinary skill inthe art would understand that such a group has 4 open positions left oncarbon atoms. (8 initial positions, minus two for the C—C bond, minusone to which the remainder of the compound is bonded, minus anadditional substituent, to leave 4 open positions). Similarly, if anethyl group in the present compounds is said to be “disubstituted,” oneof ordinary skill in the art would understand it to mean that theterminal ethyl group has 3 open positions left on the carbon atoms.

The term “reduction” is when a reductant or atom gains an electron,though there may be no shift of electrons, to decrease the oxidationcontent of the final product or atom. For example in a simple reaction:

in this example R and R′ are alkyl, and H is a generalized reducingagent.

The term “oxidation” is when an oxidant or atom loses an electron,though there may be no shift of electrons, to increase the oxidationcontent of the final product or atom. For example in a simple reaction:

in this example R and R′ are alkyl and O is a generalized oxidizingagent.

The term “TEMPO oxidation” is utilizing2,2,6,6-Tetramethylpiperidinyloxy as a stable nitroxyl radical, whichserves in an oxidation reaction as a catalyst. It allows forenvironmentally benign reactions that are good alternatives to chromiumbased reagents. An example of a TEMPO oxidation would be the catalystmixed with a starting material with a metal halide, metal acetate, andmetal halogenate kept at controlled concentrations and stirred at atemperature lower than ambient for less than 3 h.

The term “halogenation” is a reaction of an alkyl group with molecularhalogen. A hydrogen atom in the alkyl group is substituted by a halogenatom. Reversing the substitution to replace the halogen with a hydrogenor a moiety of a carbon-alkyl group is termed “de-halogenation.” Forhalogenation example in simple reaction:

For this example R is alkyl group and X is halogen.

For a de-halogenation (Alkyl de-halogenation) example:

For this example R and R′ are alkyl groups and X is halogen.

The named “Cadiot Chodkiewicz” reaction utilizes a copper (I)-catalyzedcoupling of a terminal alkyne and an alkynyl halide which offers accessto an unsymmetircial diynyl (Cadiot, P.; Chodkiewicz, W. Chemistry ofAcetylenes; Viehe, H. G., Ed.; Marcel Dekker: New York, 1969; pp597-647). An example of the reaction is in this simple scheme:

-   -   In this example R and R′ are Alkyl groups.

The term “oxidative addition” is used in transitional metals catalyzed,organometallic reactions when there is an addition of a sigma bond to ametal. The oxidation state of the metal changes +2. See FIG. 6 for aschematic example. In this example R and R′ are alkyl groups, and X is ahalogen.

The term “reductive elimination” used in transitional metals catalyzed,organometallic reactions is the reverse of oxidative addition wherethere is a disassociation of a sigma bond to reform the originalorganometallic complex. The oxidation state of the metal changes −2. SeeFIG. 6 for a schematic example. In this example R and R′ are alkylgroups, and X is a halogen.

The term “addition” is used referring to an unsaturated molecule with adouble bond which can undergo a reaction whereby a pair of electrons isremoved from the double bond (for example) and is used to attach newgroups to the molecule. For example, an O-Alkyl-C-alkoxy additiontransforms the aldehyde into an acetal (also called herein anacetalization) as in this simple example:

In this example R and R′ are Alkyl groups.

The term “nucleophilic addition” is an addition reaction wherein achemical compound a π bond is removed by the creation of two newcovalent bonds by the addition of a nucleophile. The nucleophile can bean anion or free electrons seeking an electrophile such as a proton. Forexample:

R—C≡C—C≡C—H+NaNH₂→R—C≡C—C≡C:⁽⁻⁾Na⁽⁺⁾+NH3→R—C≡C—C≡C—Na+X—R′→R—C≡C—C≡C—R′

R and R′ are alkyl groups and X is a halogen.

In this example, because the acetylide anion is a powerful nucleophileit may displace the halide ion from the primary alkyl halide to give asubstituted dialkynyl as a product.

The term triple bond migration rearrangement also called anisomerization is the process by which one molecule is transformationinto another molecule which has exactly the same atoms, but whereinthese atoms are rearranged. When the isomerisation occursintramolecularly it is considered a rearrangement reaction which is anorganic reaction where the carbon skeleton of a molecule is rearrangedto give a structural isomer of the original molecule. For example:

The term “hydrolysis” is used as the reverse or opposite of“condensation,” a reaction in which two molecular fragments are joinedfor each water molecule produced. Thus, the two joined molecularfragments are reacted with water usually in the presence of an acid tobreak the fragments into separate fragments. A simple example is:

In this example R and R′ are Alkyl.

The terms “cis” (Z) and “trans” (E) are also referred to as geometricstereoisomers with configurations relative to a C═C moiety. “Cis” alsoknown as Z in nomenclature configures the carbons on a geometric planeto have the constituents of the substituted carbons on the same side ofthe plane as seen in the example of 2-butene. For example;

Conversely, “trans” also known as E in nomenclature configures thecarbons on a geometric plane to have the on opposite sides of the planeas seen in the example of trans-2-butene. For example;

The term “environmentally benign” refers to using chemicals in syntheticreactions that create less of a burden on the environment. This includesbut is not limited to the physical environment, the personal workingenvironment, and the like. For example, for the physical environment,the issues in hazardous waste disposal of heavy metals and in thepersonal working environment, exposure to toxic chemicals being used orcreated by the worker or in odor concentration threshold nuisances.

The term “ambient temperature” is the normal temperature of the air andor environment around the process being performed usually between thetemperature of 20° C. and 27° C. without any abnormal heat source beingapplied.

The term “starting material” is the compounds that are used to bereactants in each reaction step. This can be used interchangeably withintermediate products when it makes sense. For example, if a compound ishaving a reaction performed on it, it is a reactant and startingmaterial. If a compound is the result of the reaction then it is not astarting material but could become a starting material if it is used ina subsequent reaction step.

The term “protecting group” is a chemical modification of a functionalgroup moiety in order to obtain chemoselectivity in a subsequentchemical reaction of a multi-step organic synthesis. Conversely, whenthe protecting group is removed to allow for the functional group to beactivated, this is called deprotection. For example, a compound with aterminal aldehyde is transformed into an acetal in order that thealdehyde is not available for synthetic modification in a subsequentsynthetic step that could modify an un-protected aldehyde. After thesubsequent synthetic step, the acetal is transformed back to theterminal aldehyde and is available as a functional group.

The terms “oxy” or “oxo” is an oxygen or a moiety that has a substituentof oxygen.

The terms “halo” and/or “halogen” refer to fluorine, chlorine, bromineor iodine.

The term “halide” is a binary compound, of which one part is a halogenatom and the other part is an element or radical that is lesselectronegative than the halogen, to make a fluoride, chloride, bromide,and iodide.

The term “acetal” refers to a carbon atom that is substituted with twosingle bonded oxygens such as an alkoxy moiety.

The term “aldehyde” refers to a terminal carbon atom bonded to ahydrogen atom and double bonded to an oxygen atom.

The term “alkyl” refers to a saturated aliphatic hydrocarbon radicalincluding straight chain and branched chain groups of 1 to 16 carbonatoms. Examples of (C₁ to C₆) alkyl groups include methyl, ethyl,propyl, 2-propyl, n-butyl, iso-butyl, tert-butyl, pentyl, hexyl, and thelike.

The term “alkenyl” means an alkyl moiety comprising 2 to 16 carbonshaving at least one carbon-carbon double bond. The carbon-carbon doublebond in such a group may be anywhere along the 2 to 16 carbon chain thatwill result in a stable compound. Such groups could include both the Eand Z isomers of said alkenyl moiety. Examples of such groups include,but are not limited to, ethenyl, propenyl, butenyl, allyl, and pentenyl.

As used herein, the term “alkynyl” means an alkyl moiety comprising from2 to 16 carbon atoms and having at least one carbon-carbon triple bond.The carbon-carbon triple bond in such a group may be anywhere along the2 to 16 carbon chain that will result in a stable compound. An “internalalkynyl” is when a triple bonded carbon pair is found at some positionon the carbon chain that is not an end of the carbon chain. Conversely,a “terminal alkynyl” is when a triple bonded carbon pair is found at anend of the carbon chain. Examples of such groups include, but are notlimited to, ethyne, propyne, 1-butyne, 2-butyne, 1-pentyne, 2-pentyne,1-hexyne, 2-hexyne, and 3-hexyne.

The term “alkanal” means an alkyl moiety comprising 2 to 16 carbonshaving an aldehyde on a terminal end.

The term “alkenal” means an alkenyl moiety comprising of 2 to 16 carbonshaving an aldehyde on a terminal end.

As used herein, the term “diynyl” means an alkyl moiety comprising from4 to 16 carbon atoms and having at least two carbon-carbon triple bonds.The carbon-carbon triple bond in such a group may be anywhere along the4 to 16 carbon chain that will result in a stable compound.

The term “alkoxy”, as used herein, means an O-alkyl group wherein saidalkyl group contains from 1 to 16 carbon atoms and is straight,branched, or cyclic. Examples of such groups include, but are notlimited to, methoxy, ethoxy, n-propyloxy, iso-propyloxy, n-butoxy,iso-butoxy, tert-butoxy, cyclopentyloxy, and cyclohexyloxy.

The term “cycloalkenyl” means an unsaturated, monocyclic ring structurehaving a total of from 5 to 8 carbon ring atoms with at least one C═Cdouble bond in the cycle. Examples of such groups include, but notlimited to, cyclopentenyl, cyclohexenyl.

According to one or more embodiments of the invention, methods ofsynthesis for the navel orangeworm pheromone are shown in FIG. 1,scheme 1. According to embodiments of the invention shown in FIG. 2,scheme 1a that generally follows pathway I of scheme 1, a step A is areaction using compound of formula 1

a step B is a reaction using compound of formula 2

a step C is a reaction using compound of formula 3

a step D is a reaction using compound of formula 5a

a step E is a reaction using compound of formula 4

and using compound of formula 5b

a step F is a reaction using compound of formula 6

to form the final compound of formula 7

wherein: X and X′ is halogen; Y is —OH; Y′ is ═O; R¹ is [—CH₂—]_(m),alkyl; R² and R⁴ are —C≡CH, alkynyl; R³ is CH₃—[CH₂]_(n)—, alkyl; R⁵ is[—C≡C—]_(p), alkynyl, R⁶ is [—C≡C—]_(q), alkynylR⁷ is —C═C—C═C—,alkenyl, R⁸, W is —O-alkyl, —O—R³, —O—CH₂—CH₃; R⁸ is the geometric cisconfiguration represented by structure

m is independently 5, 6, 7, 8, 9, 10, 11, 12; n is independently 1, 2,3; p is independently 1, 2; and q is independently 1, 2.

Another embodiment of the invention is when X is chlorine; X′ isbromine; R¹ is [—CH₂—]_(m); R² is —C≡CH; R³ is CH₃—[CH₂]_(n)—; R⁴ is—C≡CH; R⁵ is [—C≡C—]_(p); R⁶ is [—C≡C—]_(q); R⁷ is R⁸; R⁸ is thegeometric cis configuration represented by structure

W is —O—CH₂CH₃; m is 10; n is 1; p is 1; q is 2.

In that the steps of FIG. 2, scheme 1a, and FIG. 3, scheme 1b, havesimilar overlapping steps, those steps have been given similar letteringand numbering for ease of following the synthetic pathways. Where thetwo pathways diverge other letters and numbers are used to show thosesequence of steps. The alphabetical and numerical order is to be used asit makes sense in the schemes shown but is not necessarily in normalalphabetical or numerical order as seen in the pathways. According tothe embodiments of the invention shown in FIG. 3, scheme 1b, thatgenerally follows the pathway II of scheme 1, a step A is a reactionusing compound of formula 1

a step B is a reaction using compound of formula 2

a step G is an optional reaction using compound of formula 8a

step H is a reaction using compound of formula 3

and compound of formula 8b

and step F is a reaction using compound of formula 6

to form the final compound of formula 7

wherein: X is halogen; Y is —OH; Y′ is ═O; R¹ is [—CH₂—]_(m), or alkyl;R³ is CH₃—[CH₂]_(n)—, or alkyl; R⁵ is [—C≡C—]_(p), or alkynyl; R⁶ is[—C≡C—]_(q), or alkynyl; R⁷ is —C═C—C═C—, alkenyl, or R⁸; W is —O-alkyl,—O—R₃, or —O—CH₂—CH₃; R⁸ is the geometric cis configuration representedby structure

R⁹ is —CH₃, or alkyl; R¹⁰ is ≡C⁽⁻⁾, carbon anion, or de-protonatedcarbon; M is a metal, such as but not limited to sodium, lithium,potassium, magnesium, wherein M and R¹⁰ together may form a salt; m isindependently 5, 6, 7, 8, 9, 10, 11 or 12; n is independently 1, 2 or 3;p is independently 1 or 2; q is independently 1 or 2.

Another embodiment of the invention is when X is chlorine; R₁ is[—CH₂—]_(m); R² is —C≡CH; R³ is CH₃—[CH₂]_(n)—; R⁵ is [—C≡C—]_(p); R⁶ is[—C≡C—]_(q); R⁷ is R⁸; W is —O—CH₂—CH₃; R⁸ is the geometric cisconfiguration represented by structure

R⁹ is —CH₃, R¹⁰ is ≡C⁽⁻⁾; M is sodium; m is 10; n is 1; p is 1; q is 2.

Other embodiments of the invention are described in the following steps.

Scheme 1: Step A:

In the method of synthesis shown in FIG. 1, scheme 1, according toembodiments of the invention, the compound of formula (1) which isgenerally known and commonly acquired is reacted to form compound offormula (2), preferably using an oxidation reaction and most preferablyusing a TEMPO oxidation. The compound of formula (1) is preferably ahalo substituted alkyl alcohol, most preferably 10-chlorodecan-1-ol, andcompound of formula (2) is preferably a halo substituted alkanal, mostpreferably 10-chlorodecan-1-al.

The method of synthesis shown in FIG. 1, scheme 1-step A according toembodiments of the invention is carried out using various diluents.Suitable diluents are virtually all inert organic solvents. Thesepreferably include aliphatic, aromatic, and optionally halogenatedhydrocarbons such as pentane, hexane, heptane, cyclohexane, petroleumether, benzene, ligroin, benzene, toluene, xylene, methylene chloride,ethylene chloride, chloroform, carbon tetrachloride, chlorobenzene, ando-dichlorobenzene, ethers, such as diethyl ether, dibutyl ether,methyl-tert-butyl ether, methyl-tert amyl ether, glycol dimethyl etherand diglycol dimethyl ether, tetrahydrofuran, and dioxane; ketones suchas acetone methyl ethyl ketone, methyl isopropyl ketone or methylisobutyl ketone, esters, such as methyl acetate or ethyl acetate,nitriles, such as for example acetonitrile or propionitrile, amides suchas for example, dimethylformamide, dimethylacetamide andN-methylpyrrolidone, and also dimethylsulfoxide, tetramethylene sulphoneor hexamethyl phosphoric triamide. Most preferably the diluent is ethylacetate.

The method of synthesis shown in FIG. 1, scheme 1, step A, according toembodiments of the invention is carried out using various reagents.Suitable reagents in the reaction are alkali halides such as for examplesodium bromide, sodium chloride and sodium iodide, metal acetates, suchas lithium, sodium or potassium acetate, preferably sodium acetate, andalkali metal hypochlorites, preferably sodium hypochlorite.

The method of synthesis shown in FIG. 1, scheme 1, step A, according toembodiments of the invention is carried out preferably using a catalyst,preferably cyclic nitrosyl tertiary amines, most preferably2,2,6,6-Tetramethylpiperidinyloxy.

The reaction temperatures in method of synthesis of FIG. 1, scheme 1,step A, according to embodiments of the invention can be varied within awide range. In general the step can be carried out between 0 and 35° C.,preferably between 5 and 10° C.

The method of synthesis shown in FIG. 1, scheme 1, step A, according toembodiments of the invention is generally carried out under atmosphericpressure or slight positive pressure. However it is also contemplatedthat it is possible to operate under elevated or reduced pressures.

For carrying out the method of synthesis in FIG. 1, scheme 1, step A,according to embodiments of the invention, the reagents are generally inapproximately equimolar amounts with the starting material. However, itis possible to have one or two of the reagents in either a small excessor shortage. The catalysts are generally in lower molar amounts as isnecessary for the reaction. The work up is carried out by customarymethods known in the art (cf. Example 1).

Scheme 1: Step B

In the method of synthesis shown in FIG. 1, scheme 1, according toembodiments of the invention, the compound of formula (2) is reacted toform compound of formula (3), preferably using an alkylation reaction,most preferably an O-alkyl-C-alkoxy addition reaction, particularlypreferably an acetalization reaction. The compound of formula (2) ispreferably a halo substituted alkanal, most preferably10-chlorodecan-1-al and the compound of formula (3) is preferably a halosubstituted dialkoxy substituted alkyl, most preferably10-chloro-1,1-diethoxydecane.

The method of synthesis shown in FIG. 1, scheme 1, step B, according toembodiments of the invention is carried out using various diluents.Suitable diluents are virtually all inert organic solvents. Thesepreferably include aliphatic, aromatic, and optionally halogenatedhydrocarbons such as pentane, hexane, heptane, cyclohexane, petroleumether, benzene, ligroin, benzene, toluene, xylene, methylene chloride,ethylene chloride, chloroform, carbon tetrachloride, chlorobenzene, ando-dichlorobenzene, ethers, such as diethyl ether, dibutyl ether,methyl-tert-butyl ether, methyl-tert amyl ether, glycol dimethyl etherand diglycol dimethyl ether, tetrahydrofuran, and dioxane; ketones suchas acetone, methyl ethyl ketone, methyl isopropyl ketone or methylisobutyl ketone, esters, such as methyl acetate or ethyl acetate,nitriles, such as for example acetonitrile or propionitrile, amides suchas for example, dimethylformamide, dimethylacetamide andN-methylpyrrolidone, and also dimethylsulfoxide, tetramethylene sulphoneor hexamethyl phosphoric triamide. Preferably the diluent of ethylacetate.

The method of synthesis shown in FIG. 1, scheme 1, step B, according toembodiments of the invention is carried out using various reagents.Suitable reagents in the reaction are acetals such as chloroacetaldehydedimethyl acetal, acetaldehyde dimethyl acetal, trimethyl orthoformate,trialkyl orthofromates most preferably triethylorthoformate, andalcohols such as methanol, ethanol, or isopropanol.

The method of synthesis shown in FIG. 1, scheme 1, step B, according toembodiments of the invention is carried out preferably using an acidcatalyst, preferably organic acid, such as methanesulfonic acid orp-toluenesulfonic acid and most preferably p-toluenesulfonic acid.

The reaction temperatures in method of synthesis FIG. 1, scheme 1, stepB, according to embodiments of the invention can be varied within a widerange. In general the step can be carried out between 0 and 60° C.,preferably between 15 and 25° C., most preferably at ambienttemperature.

The method of synthesis shown in FIG. 1, scheme 1, step B, according toembodiments of the invention is generally carried out under atmosphericpressure or slight positive pressure. However it is also contemplatedthat it is possible to operate under elevated or reduced pressures.

For carrying out the method of synthesis in FIG. 1, scheme 1-step Baccording to embodiments of the invention, the reagents are generally inapproximately equimolar amounts with the starting material. However, itis possible to have the reagents in either a small excess or shortage.The catalysts are generally in lower molar amounts as is necessary forthe reaction. The work up is carried out by customary methods known inthe art (cf. Example 1).

Scheme 1: Pathway I, Step C

In the method of synthesis shown in FIG. 1, scheme 1, pathway I, step C,according to embodiments of the invention, the compound of formula (3)is reacted to form compound of formula (4), preferably using analkylation reaction, more preferably an alkynyl-de-halogenationreaction. The embodiments of pathway I are also referred to as Scheme1a. The compound of formula (3) is preferably a halo substituteddialkoxy substituted alkyl, most preferably 10-chloro-1,1-diethoxydecaneand the compound of formula (4) is preferably a dialkoxy substitutedalkynyl, most preferably 12,12-diethoxydodec-1-yne.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step C,according to embodiments of the invention is carried out using variousdiluents. Suitable diluents are virtually all inert organic solvents.These preferably include aliphatic, aromatic, and optionally halogenatedhydrocarbons such as pentane, hexane, heptane, cyclohexane, petroleumether, benzene, ligroin, benzene, toluene, xylene, methylene chloride,ethylene chloride, chloroform, carbon tetrachloride, chlorobenzene, ando-dichlorobenzene, ethers, such as diethyl ether, dibutyl ether,methyl-tert-butyl ether, methyl-tert amyl ether, glycol dimethyl etherand diglycol dimethyl ether, tetrahydrofuran, and dioxane; ketones suchas acetone, methyl ethyl ketone, methyl isopropyl ketone or methylisobutyl ketone, esters, such as methyl acetate or ethyl acetate,nitriles, such as for example acetonitrile or propionitrile, amides suchas for example, dimethylformamide, dimethylacetamide andN-methylpyrrolidone, and also dimethylsulfoxide, tetramethylene sulfoneor hexamethyl phosphoric triamide. Most preferably using diluent ofdimethylsulfoxide.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step C,according to embodiments of the invention is carried out using variousreagents. Suitable reagents in the reaction are organometallic acetylidecomplexes, preferably lithium acetylide, sodium acetylide and potassiumacetylide complexes, most preferably lithium acetylide, ethylenediaminecomplex.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step C,according to embodiments of the invention is carried out preferablyusing a catalyst, most preferably a metal halide, particularlypreferably sodium iodide.

The reaction temperatures in method of synthesis FIG. 1, scheme 1,pathway I, step C, according to embodiments of the invention can bevaried within a wide range. In general the step can be carried outbetween 10 and 60° C., preferably between 20 and 40° C., most preferablyat 30° C.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step C,according to embodiments of the invention is generally carried out underatmospheric pressure or slight positive pressure. However it is alsocontemplated that it is possible to operate under elevated or reducedpressures.

The yield from the method of synthesis FIG. 1, scheme 1, pathway I, stepC, according to embodiments of the invention can be varied within a widerange. Preferably the range would be greater than 50%, most preferablythe range would be greater than 76%, and particularly preferably therange would be greater than 90% and very particular preferably, greaterthan 93%.

For carrying out the method of synthesis in FIG. 1, scheme 1, pathway I,step C, according to embodiments of the invention, the reagents aregenerally in approximately equimolar amounts with the starting material.However, it is possible to have the reagents in either a small excess orshortage. The catalysts are generally in lower molar amounts as isnecessary for the reaction. The work up is carried out by customarymethods known in the art (cf. Example 1).

Scheme 1: Pathway I, Step D

In the method of synthesis shown in FIG. 1, scheme 1 according toembodiments of the invention, the compound of formula (5a) is reacted toform compound of formula (5b), preferably using a substitution reactionmost preferably a halogenation. The compound of formula 5(a) ispreferably an alkynyl, most preferably but-1-yne and compound of formula5(b) is preferably a halo substituted alkynyl, most preferably1-bromobut-1-yne.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step D,according to embodiments of the invention is carried out using variousdiluents. Suitable diluents are virtually all inert organic solvents.These preferably include aliphatic, aromatic, and optionally halogenatedhydrocarbons such as pentane, hexane, heptane, cyclohexane, petroleumether, benzene, ligroin, benzene, toluene, xylene, methylene chloride,ethylene chloride, chloroform, carbon tetrachloride, chlorobenzene, ando-dichlorobenzene, ethers, such as diethyl ether, dibutyl ether,methyl-tert-butyl ether, methyl-tert amyl ether, glycol dimethyl etherand diglycol dimethyl ether, tetrahydrofuran, and dioxane; ketones suchas acetone, methyl ethyl ketone, methyl isopropyl ketone or methylisobutyl ketone, esters, such as methyl acetate or ethyl acetate,nitriles, such as for example acetonitrile or propionitrile, amides suchas for example, dimethylformamide, dimethylacetamide andN-methylpyrrolidone, and also dimethylsulfoxide, tetramethylene sulfoneor hexamethyl phosphoric triamide. Preferably the diluent is water.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step Daccording to embodiments of the invention is carried out using variousreagents. Suitable reagents in the reaction are alkali metal hydroxides,such as lithium hydroxide, sodium hydroxide, and potassium hydroxide,most preferably potassium hydroxide; and halogens such as chlorine,iodine, and bromine, preferably bromine or chlorine, most preferablybromine.

The reaction temperatures in method of synthesis FIG. 1, scheme 1,pathway I, step D, according to embodiments of the invention can bevaried within a wide range. In general the step can be carried outbetween 10 and 85° C., preferably between 15 and 25° C., most preferablyat ambient temperature.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step D,according to embodiments of the invention is generally carried out underatmospheric pressure or slight positive pressure. However it is alsocontemplated that it is possible to operate under elevated or reducedpressures.

For carrying out the method of synthesis in FIG. 1, scheme 1, pathway I,step D, according to embodiments of the invention, the reagents aregenerally in approximately equimolar amounts with the starting material.However, it is possible to have the halogen containing reagents ineither a small excess or shortage and the metal hydroxide in greatexcess. The work up is carried out by customary methods known in the art(cf. Example 1).

Scheme 1: Pathway I Step E

In the method of synthesis shown in FIG. 1, scheme 1, pathway I, step E,according to embodiments of the invention, the compound of formula (5b)is reacted with the compound of formula (4) to form compound of formula(6), preferably using a cycle of oxidative additions and reductiveeliminations, most preferably a Cadiot-Chodkiewicz reaction. Thecompound of formula (5b) is preferably a halo substituted alkynyl, mostpreferably 1-bromobut-1-yne and the compound of formula (4) ispreferably a dialkoxy substituted alkynyl, most preferably12,12-diethoxydodec-1-yne. The compound of formula (6) is preferably adialkoxy substituted diynyl and most preferably16,16-diethoxyhexadeca-3,5-diyne.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step E,according to embodiments of the invention is carried out using variousdiluents. Suitable diluents are virtually all inert organic solvents.These preferably include aliphatic, aromatic, and optionally halogenatedhydrocarbons such as pentane, hexane, heptane, cyclohexane, petroleumether, benzene, ligroin, benzene, toluene, xylene, methylene chloride,ethylene chloride, chloroform, carbon tetrachloride, chlorobenzene, ando-dichlorobenzene, ethers, such as diethyl ether, dibutyl ether,methyl-tert-butyl ether, methyl-tert amyl ether, glycol dimethyl etherand diglycol dimethyl ether, tetrahydrofuran, and dioxane; ketones suchas acetone, methyl ethyl ketone, methyl isopropyl ketone or methylisobutyl ketone, esters, such as methyl acetate or ethyl acetate,nitriles, such as for example acetonitrile or propionitrile, amides suchas for example, dimethylformamide, dimethylacetamide andN-methylpyrrolidone, and also dimethylsulfoxide, tetramethylene sulfoneor hexamethyl phosphoric triamide, alcohols such as methanol, ethanol,n-propanol, isopropanol, butanol, tert-butanol. Preferably the diluentsof methanol and methyl-tert-butyl ether.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step E,according to embodiments of the invention is carried out using variousreagents. Suitable reagents in the reaction are monoamines (primary oralkyl hydroxylamines), such as N-methyl or N-ethyl hydroxylamine mostpreferably hydroxylamine hydrochloride, and basic alkyl amines, such asethylamine, triethylamine, propylamine, preferably n-propylamine.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step E,according to embodiments of the invention is carried out preferablyusing a catalyst, most preferably a metal halide, particularlypreferably copper (I) chloride.

The reaction temperatures in method of synthesis FIG. 1, scheme 1,pathway I, step E, according to embodiments of the invention can bevaried within a wide range. In general the step can be carried outbetween −40° C. and 25° C., preferably between 0 and −20° C., mostpreferably about 0° C. and about −20° C.

The method of synthesis shown in FIG. 1, scheme 1, pathway I, step Eaccording to embodiments of the invention is generally carried out underatmospheric pressure or slight positive pressure. However it is alsocontemplated that it is possible to operate under elevated or reducedpressures.

For carrying out the method of synthesis in FIG. 1, scheme 1, pathwayI—step E according to embodiments of the invention, the reagents aregenerally in excess in molar amounts with the starting material. Thecatalysts are generally in lower molar amounts as is necessary for thereaction. The work up is carried out by customary methods known in theart (cf. Example 1).

The yield from the method of synthesis FIG. 1, scheme 1, pathway I, stepE according to embodiments of the invention can be varied within a widerange. Preferably the range would be greater than 50%, most preferablythe range would be greater than about 76%, and particularly preferablythe range would be greater than 87%.

Scheme 1: Pathway II Step G

In the method of synthesis shown in FIG. 1, scheme 1, pathway II, stepG, is an optional step according to embodiments of the invention basedon commercial availability of compound of formula (8b), needs of thesynthesis and the like. The embodiments of pathway II are also referredto as Scheme 1b. The compound of formula (8a) is reacted to formcompound of formula (8b), preferably using a triple bond migrationrearrangement reaction, most preferably an isomerization. The compoundof formula (8a) is preferably an internal alkyne, most preferably2,4-hexadiyne and the compound of formula (8b) is preferably a terminalalkyne, most preferably, 1,3-hexadiyne.

The method of synthesis shown in FIG. 1, scheme 1, pathway II, step G,according to embodiments of the invention is carried out using variousdiluents. Suitable diluents are virtually all inert organic solvents.These preferably include aliphatic, aromatic, and optionally halogenatedhydrocarbons such as pentane, hexane, heptane, cyclohexane, petroleumether, benzene, ligroin, benzene, toluene, xylene, methylene chloride,ethylene chloride, chloroform, carbon tetrachloride, chlorobenzene, ando-dichlorobenzene, ethers, such as diethyl ether, dibutyl ether,methyl-tert-butyl ether, methyl-tert amyl ether, glycol dimethyl etherand diglycol dimethyl ether, tetrahydrofuran, and dioxane; ketones suchas acetone, methyl ethyl ketone, methyl isopropyl ketone or methylisobutyl ketone, esters, such as methyl acetate or ethyl acetate,nitriles, such as for example acetonitrile or propionitrile, amides suchas for example, dimethylformamide, dimethylacetamide andN-methylpyrrolidone, and also dimethylsulfoxide, tetramethylene sulfoneor hexamethyl phosphoric triamide. Most preferably using diluent ofether.

The method of synthesis shown in FIG. 1, scheme 1, pathway II, step G,according to embodiments of the invention is carried out using variousreagents. Suitable reagents in the reaction are bases, such as strongbases of alkali metal amides sodium amide and potassium3-aminoproylamide, preferably sodium amide.

The reaction temperatures in method of synthesis FIG. 1, scheme 1,pathway II, step G according to embodiments of the invention can bevaried within a wide range. In general the step can be carried outbetween −10 and 50° C., preferably between 0 and 20° C., most preferablyat 10° C.

The method of synthesis shown in FIG. 1, scheme 1, pathway II-step Gaccording to embodiments of the invention is generally carried out underatmospheric pressure or slight positive pressure. However it is alsocontemplated that it is possible to operate under elevated or reducedpressures.

The yield from the method of synthesis FIG. 1, scheme 1, pathway II,step G according to embodiments of the invention can be varied within awide range. Preferably the range would be greater than 50%, mostpreferably the range would be greater than 76%, and particularlypreferably the range would be greater than 90%.

For carrying out the method of synthesis in FIG. 1, scheme 1, pathwayII, step G, according to embodiments of the invention, the reagents aregenerally in approximately equimolar amounts with the starting material.However, it is possible to have the reagents in either a small excess orshortage. The work up is carried out by customary methods known in theart (see C. A. Brown and A. Yamashita (1975). “Saline hydrides andsuperbases in organic reactions. IX. Acetylene zipper. Exceptionallyfacile contrathermodynamic multipositional isomerization of alkynes withpotassium 3-aminopropylamide”. J. Am. Chem. Soc. 97 (4): 891-892).

Scheme 1: Pathway II Step H

In the method of synthesis shown in FIG. 1, scheme 1, pathway II, StepH, according to embodiments of the invention, the compound of formula(3) is reacted with compound of formula (8b) to form compound of formula(6), preferably using a nucleophilic addition reaction. The reaction isoptionally performed in situ with the reactions of step G. The compoundof formula (3) is preferably a halo substituted dialkoxy substitutedalkyl, most preferably 10-chloro-1,1-diethoxydecane, the compound offormula (8b) is preferably a terminal alkynyl, most preferably,1,3-hexadiyne, the compound of formula (6) is preferably a dialkoxysubstituted diynyl and most preferably 16,16-diethoxyhexadeca-3,5-diyne.

The method of synthesis shown in FIG. 1, scheme 1, pathway II, step H,according to embodiments of the invention is carried out using variousdiluents. Suitable diluents are virtually all inert organic solvents.These preferably include aliphatic, aromatic, and optionally halogenatedhydrocarbons such as pentane, hexane, heptane, cyclohexane, petroleumether, benzene, ligroin, benzene, toluene, xylene, methylene chloride,ethylene chloride, chloroform, carbon tetrachloride, chlorobenzene, ando-dichlorobenzene, ethers, such as diethyl ether, dibutyl ether,methyl-tert-butyl ether, methyl-tert amyl ether, glycol dimethyl etherand diglycol dimethyl ether, tetrahydrofuran, and dioxane; ketones suchas acetone, methyl ethyl ketone, methyl isopropyl ketone or methylisobutyl ketone, esters, such as methyl acetate or ethyl acetate,nitriles, such as for example acetonitrile or propionitrile, amides suchas for example, dimethylformamide, dimethylacetamide andN-methylpyrrolidone, and also dimethylsulfoxide, tetramethylene sulfoneor hexamethyl phosphoric triamide. Preferably using diluent of ammonia,most preferably using a diluent of ether.

The method of synthesis shown in FIG. 1, scheme 1, pathway II, step H,according to embodiments of the invention is carried out using variousreagents. Suitable reagents in the reaction are bases, such as strongbases of alkali metal amides, sodium amide, lithium amide, potassiumamide, magnesium amide, and potassium 3-aminoproylamide, preferablysodium amide.

The reaction temperatures in method of synthesis FIG. 1, scheme 1,pathway II, step H, according to embodiments of the invention can bevaried within a wide range. In general the step can be carried outbetween −10 and 50° C., preferably between 0 and 20° C., most preferablyat 10° C.

The method of synthesis shown in FIG. 1, scheme 1, pathway II, step H,according to embodiments of the invention is generally carried out underatmospheric pressure or slight positive pressure. However it is alsocontemplated that it is possible to operate under elevated or reducedpressures.

The yield from the method of synthesis FIG. 1, scheme 1, pathway II,step H, according to embodiments of the invention can be varied within awide range. Preferably the range would be greater than 50%, mostpreferably the range would be greater than 76%, and particularlypreferably the range would be greater than 85%.

For carrying out the method of synthesis in FIG. 1, scheme 1, pathwayII, step H, according to embodiments of the invention, the reagents aregenerally in approximately equimolar amounts with the starting material.However, it is possible to have the reagents in either a small excess orshortage. The work up is carried out by customary methods known in theart.

Scheme 1: Step F

In the method of synthesis shown in FIG. 1, scheme 1 according toembodiments of the invention, the compound of formula (6) is reacted toform the compound (7), preferably using a reduction reaction and ahydrolysis reaction, more preferably an alkyne reduction and an acetalhydrolysis. The compound of formula (6) is preferably a dialkoxysubstituted diynyl, most preferably 16,16-diethoxyhexadeca-3,5-diyne andthe compound of formula (7) is preferably a navel orangeworm sexattractant pheromone, most preferably the cis-cis isomer of thepheromone, and particularly preferably is (Z,Z)-11,13-hexadecadien-1-al.

The method of synthesis shown in FIG. 1, scheme 1, step F, according toembodiments of the invention is carried out using various diluents.Suitable diluents are virtually all inert organic solvents. Thesepreferably include aliphatic, aromatic, and optionally halogenatedhydrocarbons such as pentane, hexane, heptane, cyclohexane, petroleumether, benzene, ligroin, benzene, toluene, xylene, methylene chloride,ethylene chloride, chloroform, carbon tetrachloride, chlorobenzene, ando-dichlorobenzene, ethers, such as diethyl ether, dibutyl ether,methyl-tert-butyl ether, methyl-tert amyl ether, glycol dimethyl etherand diglycol dimethyl ether, tetrahydrofuran, and dioxane; ketones suchas acetone, methyl ethyl ketone, methyl isopropyl ketone or methylisobutyl ketone, esters, such as methyl acetate or ethyl acetate,nitriles, such as for example acetonitrile or propionitrile, amides suchas for example, dimethylformamide, dimethylacetamide andN-methylpyrrolidone, and also dimethylsulfoxide, tetramethylene sulfoneor hexamethyl phosphoric triamide, Preferably the diluent istetrahydrofuran.

The method of synthesis shown in FIG. 1, scheme 1, step F, according toembodiments of the invention is carried out using various reagents.Suitable reagents in the reaction are alkenes such as 2-methyl propene,2-butene, 2-methyl butene and cycloalkenyls, such as cyclopentene,cyclohexene, cycloheptene and cyclooctene, most preferably cyclohexene;organometallic complexes, such as borane complexes, includingborane-THF, borane-methylsulfide and borane-amine complexes, preferablyborane-N,N-diethylaniline; a weak acid, such as formic acid,trifluoroacetic acid and acetic acid preferably glacial acetic acid; andeither a strong aqueous acid, such as HCl or sulfuric acid, preferablysulfuric acid, or a metal tetrafluoroborate complex, such as copper (II)tetrafluoroborate or sodium borofluoride.

An unexpected benefit in using the preferred embodiment withborane-N,N-diethylaniline is the storage stability of the reagent, lackof nuisance odor and efficient reactions. While borane-THF is unstablewith respect to storage past several months at ambient temperatures,DEANB is stable for long periods at ambient temperature. DEANB does nothave a nuisance odor such as the case in using borane methyl sulfide.DEANB provides high yields of stereospecific product that is comparableor better than alternatives such as borane THF. DEANB as normallycommercially available comes in a higher molar strength (5.6 M) thanalternative boranes such as borane THF (1M) which allows more efficiencyof utilizing higher concentrations in the reaction solution. Anotherefficiency is the reactivity of DEANB. This allows an almoststoichiometric amount of reagent (2:1) to be used to form thedicyclohexyl borane as compared to the borane THF which requires anexcess.

According to embodiments of the invention in FIG. 1, scheme 1, step F,efficiencies are gained in the use of an organo metallic reducing agentin conjunction with hydrolysis agents such as a strong aqueous acid ormetal fluoroborate complexes allowing for a combination oftransformations in the compound with both a reduction in diynyls andhydrolysis of the acetal. Furthermore, use of the metal fluoroboratecomplexes allows for higher yields in the final transformation step.

The reaction temperatures in method of synthesis FIG. 1, scheme 1-step Faccording to embodiments of the invention can be varied within a widerange. In general the step can be carried out between −10° C. and 80°C., preferably between 5 and 60° C., most preferably about 5° C. andabout 60° C.

The method of synthesis shown in FIG. 1, scheme 1-step F according toembodiments of the invention is generally carried out under atmosphericpressure or slight positive pressure. However it is also contemplatedthat it is possible to operate under elevated or reduced pressures.

For carrying out the method of synthesis in FIG. 1, scheme 1, step F,according to embodiments of the invention, the reagents are generally inexcess in molar amounts with the starting material. The work up iscarried out by customary methods known in the art (cf. Example 1). Inthe general work-up, the final product's separation or isolation fromother synthetic constituents also known as purification can be carriedout implementing common techniques such as concentration on silica gel,normal phase LC, reverse-phase HPLC, distillation or crystallization. Acrystallization technique used for isolation may use a salt adducts suchas sodium bisulfite. The purified final product can be held as a saltadduct to create a more stabile product. The salt adduct cansubsequently be removed by application of a base. Crystallization can beadvantageous because it does not apply heat, as in distillation,allowing for less degradation with thermally sensitive products.

The yield from the method of synthesis FIG. 1, scheme 1, step F,according to embodiments can be varied within a wide range. Preferablythe range would be greater than 50%, most preferably the range would begreater than about 76%, and particularly preferably the range would begreater than 87%.

The method of synthesis according to embodiments of the inventionsallows the final product to be used in the methods of trapping insects,methods for attracting insect pests, methods of disrupting mating asdescribed in U.S. patent application 2006/0280765, and to be admixedwith other pheromones from the Ando type I and type II categories forthe same.

The method of synthesis according to embodiments of the invention allowsfor a synthesis kit which may include all necessary reagents asdescribed herein, diluents as described herein, all intermediate andstarting materials as described herein, and any necessary apparatuses toperform the reaction steps as described herein.

The following example of a specific embodiment for carrying out theinvention is offered for illustrative purposes only and is not intendedto limit the scope of the present invention in any way.

PROCEDURES FOR THE EXAMPLES

The structures and purities of the compounds of the following Exampleswere confirmed by proton magnetic resonance spectroscopy (¹H NMR) andgas chromatography (GC).

Proton magnetic resonance (¹H NMR) spectra were determined using a 300megahertz, Varian Mercury System spectrometer operating at a fieldstrength of 300 megahertz (MHz). Chemical shifts are reported in partsper million (ppm) downfield from an internal tetramethylsilane standard.Alternatively, ¹H NMR spectra were referenced to residual protic solventsignal: CHCl₃=7.26 ppm. Peak multiplicities are designated as follows:s=singlet; d=doublet; dd=doublet of doublets; t=triplet; q=quartet,qn=quintet; br=broad resonance; and m=multiplet. Coupling constants aregiven in Hertz. GC chromatographs were run on a 5890 Series II HewlettPackard System fitted with a SP™-2380 30 m×0.52 mm×0.20 μm column (SP)or HP-Ultra 2, 25 m×0.20 mm×0.33 μm column (HP). Unless otherwisestated, a gradient of 10° C./min starting at 40° C. held for 2 minutesmoving the gradient for 25 minutes and bringing the temperature up to250° C. for 2.0 minutes. Water content was estimated utilizing a KarlFisher (KF) apparatus. Retention times (Rt) are given in minutes. Allreactions were performed in septum-sealed flasks under a slight positivepressure of nitrogen, unless otherwise noted. All commercial reagentswere used as received from their respective suppliers (Su). Thefollowing abbreviations are used herein: DEANB(borane-N,N-diethylaniline complex); NaBr (sodium bromide); NaOAc(sodium acetate) NaOCl (sodium hypochlorite); NaHCO₃ (sodiumbicarbonate); NaHSO₃ (sodium bisulfite); NaI (sodium iodide); KOH(potassium hydroxide); Br₂ (bromine); N₂ (nitrogen); MTBE(methyl-tert-butyl ether), HONH₂.HCl (hydroxylamine hydrochloride), CuCl(copper (I) chloride); H₂SO₄ (sulfuric acid), DMSO (dimethylsulfoxide);MeOH (methanol); THF (tetrahydrofuran); EtOAc (ethyl acetate); min. ormin (minutes); h (hours).

Example 1

See FIG. 7 for the general synthetic scheme for Example 1.

Example 1 Step A

To a solution of 10-chlorodecanol 1 (20.0 g, 103.77 mMol, Su: Laviana(Lot: T-1094001), NaBr (8.33 g, 80.94 mMol, PA reagent, Su: Acros),NaOAc.3H₂O (21.18 g, 155.66 mMol, ACS reagent, Su: Aldrich) and2,2,6,6-tetramethylpiperidinooxy (TEMPO) (162 mg, 1.04 mMol-(98% pure)Su: Acros) in H₂O (40 ml, tap) and EtOAc (120 ml, ACS reagent,Pharmco/AAPER) was added drop-wise NaOCl (100 ml, 115.19 mMol, 7.11% w/vsolution Su: Aldrich) while maintaining internal temperature below 10°C. and mechanical stirring. Concentration of NaOCl was determined bytitration. The reaction progress was monitored by GC and consideredcomplete when <3A % of the starting alcohol 1 was remaining. After 2 hrstirring at 5° C., water (60 ml, H₂O, tap) was charged into the reactionmixture to quench the reaction, and aqueous NaHSO₃ (˜1.0 ml, 2.0 M) wasused to destroy remaining NaOCl if necessary. Check for remaining NaOClwith KI-starch test paper (Su: Fisher Scientific). Aqueous phase wasextracted with EtOAc (50 ml) after phase separation. The combinedorganic layers were washed with H₂O (120 ml). The resulting organicphase was concentrated under reduced pressure (pot temperature ˜35° C.)to a volume of ˜50 ml. Fresh EtOAc (100 ml) was charged into it and thenconcentrated under reduced pressure (pot temperature ˜35° C.) to thefinal volume of 50 ml. The water content of this resultant solution waschecked by Karl Fisher method (repeat if necessary KF<0.4%), and thelight-yellow solution was used without further purification. GC: columnSP, starting condition 50° C. (1.0 min) then ramp to 250° C. at a rateof 10° C./min and hold at 250° C. for 1 minute, Rt=11.8 min for10-chlorodecanol 1 and Rt=10.3 min for 10-chlorodecanal 2. ¹H NMR(CDCl₃, 300 MHz): δ 9.77 (t, J=1.7 Hz, 1H), 3.53 (t, J=6.7 Hz, 2H), 2.43(dt, J=7.5 Hz, J=1.7 Hz, 2H), 1.77 (qn, J=7.5 Hz, 2 Hz), 1.63 (m, J=7.2Hz, 2H), 1.42 (m, J=7.2 Hz, 2H), 1.30 (br s, 8H).

Example 1 Step B

To the solution of 10-chlorodecanal 2 in EtOAc (50 ml, 103.77 mMol Su:from step A) at ambient temperature, under blanket of N₂, was chargedp-toluenesulfonic acid monohydrate (200 mg, 1.04 mMol, (99%) Su: Acros)and triethylorthoformate (19 ml, 114.15 mMol (98%) Su:Acros). Thereaction was monitored by GC for compound 2 consumption (compound 2<2.0area % by GC). After 3 hr stirring at ambient temperature, a solution ofH₂O (50 ml) and saturated NaHCO₃(aq.) (50 ml) was poured into thereaction mixture to quench the reaction. The aqueous layer was extractedwith EtOAc (50 ml) after phase separation. The combined organic phaseswere washed with a solution of H₂O (50 ml) and brine (50 ml). Theresulting organic phase was concentrated under reduced pressure (pottemperature ˜35° C.) to a volume of 50 ml. Fresh EtOAc (100 ml) wascharged into it and then concentrated under reduced pressure (pottemperature ˜35° C.) to the final volume of 50 ml. The water content waschecked by Karl Fisher method (repeat if necessary KF<0.4%). Theresultant solution was concentrated under reduced pressure (pottemperature ˜35° C.) until a constant weight (˜28 g) was established.Resultant light yellow oil was used without further purification. GC:column SP, starting condition 50° C. (1.0 min) then ramp to 250° C. at arate of 10° C./min and hold at 250° C. for 1 minute, Rt: 10.3 min for10-chlorodecanal 2 and 9.9 min for 10-chloro-1,1-diethoxydecane 3. ¹HNMR (CDCl₃, 300 MHz): δ 4.48 (t, J=5.93, 1H), 3.6 (m, J=7.03 Hz, 2H),3.53 (t, J=6.8 Hz, 2H), 3.5 (q, J=7.03 Hz, 2H), 1.76 (qn, J=6.85 Hz,2H), 1.6 (m, J=6.85 Hz, 2H), 1.4 (m, J=6.85 Hz, 2H), 1.29 (br s, 10H),1.20 (t, J=7.03 Hz, 6H);

Example 1 Step C

To a dark solution of lithium acetylide, ethylenediamine complex (13.8g, 134.90 mMol, (90%) Su: Aldrich) and NaI (0.78 g, 5.19 mMol, (99+%),Su: Acros) in DMSO (100 ml anhydrous (99.7%) Su: Acros) was charged10-chloro-1,1-diethoxydecane 3 (27.48 g, 103.77 mMol Su: from step B)while maintaining reaction temperature around 30° C., under a blanket ofN₂. The addition funnel was rinsed with DMSO (15 ml, anhyrdrous, Su:Acros). The solution was monitored by GC for compound 3 consumption(compound 3<2.0 Area % by GC). After 4 hr stirring at 30° C., H₂O (200ml) were charged into the reaction mixture to quench the reaction. Theaqueous layer was extracted with heptane (2×200 ml). The organic layerwas filtered through a plug of Celite® 521 (15 g, Su: Sigma-Aldrich) oneby one after phase separation. The combined filtrate was washed with asolution of H₂O (100 ml) and brine (50 ml). The water in this organicsolution was removed by azeotropic distillation under normal conditionsby means of adding and removing heptane (repeat if necessary untilKF=˜0.2%). The resultant solution was concentrated under reducedpressure (pot temperature ˜35° C.) to give 24.6 g of12,12-diethoxydodec-1-yne 4 as an amber liquid (93% yield over steps Athru C, after C). This material was used without further purification.GC: column SP, Rt: 12.2 for 10-chloro-1,1-diethoxydecane 3, and Rt: 11.1min for 12,12-diethoxydodec-1-yne 4 (<5 Area %). ¹H NMR (CDCl3, 400MHz): δ 4.48 (t, J=5.60, 1H), 3.6 (m, J=7.07 Hz, 2H), 3.5 (m, J=7.07 Hz,2H), 2.18 (dt, J=7.10, 2.80 Hz, 2H), 1.94 (t, J=2.60 Hz, 1H), 1.6 (m,2H), 1.52 (qn, J=7.2 Hz, 2H), 1.4 (m, 2H), 1.29 (br s, 10H), 1.20 (t,J=7.00 Hz, 6H).

Example 1 Step D

To a solution of KOH (88.0 g, 1.57 Mole, flakes, 90+%, Su: Aldrich) inH₂O (400 ml, tap) was charged Br₂ (17.5 ml, 340 mMole, reagent grade,Su: Aldrich) at ambient temperature. Through this potassiumbromide/bromate solution in Dreschel bottle (washing bottle) withfritted tube for gas dispersal was bubbled 1-butyne 5a (5.4 g, 99.83mMol, 98+%, Su: Aldrich) at ambient temperature until the light yellowcolor of this aqueous solution turned colorless. The resultant aqueoussolution was extracted with MTBE (200 ml, ACS reagent, Su:Pharmco/AAPER). After the separation of aqueous and organic layer, theorganic solvents (˜175 ml) were removed by normal distillation(temperature of distillate head: up to 60° C. and pot temperature: ˜85°C.) to give a light yellow solution of 1-bromobutyne 5b in MTBE. GC:column HP, isocratic 35° C. (10 min), Rt: 4.92 min, ¹H NMR (CDCl₃, 300MHz): δ 2.22 (q, J=7.50, 2H), 1.15 (t, J=7.50 Hz, 3H);

Example 1 Step E

To a suspension of hydroxylamine hydrochloride (7.6 g, 117.8 mMol, 99%,Su: Aldrich) and copper (I) chloride (0.39 g, 3.93 mMol, 97%, Su:Aldrich) in MeOH (80 ml, reagent ACS, Su: Pharmco/AAPER) at 0° C., undera blanket of N₂, was charged n-propylamine (20 ml, 243.27 mMol, 98%, Su:Aldrich). After 15 min stirring, a solution of 12,12-diethoxydodec-1-yne4 (10 g, 39.3 mMol, Su: from step C) in MeOH (10 ml) was charged and theaddition funnel was rinsed with MeOH (5 ml). After 15 min stirring, theresulting clear solution was cooled down to −20° C. A solution of1-bromobutyne 5b in MTBE (10.7 ml, 4.4 M, 47.2 mMol, Su: from step D)was added drop-wise within 3 hrs while maintaining temperature below−20° C. The reaction was monitored for the consumption of12,12-diethoxydodec-1-yne 4 (<3.0 Area % by GC). After 2 hours, theresulting reaction mixture was directly extracted with heptane (3×200ml). The extracted heptane-layer was passed through a pad of silica gel(10 g, gravity grade, Su: Silicycle). Solvent removed under reducedpressure to concentrate diyne 6 (10.5 g, 87% yield, 97.8 Area % by GC).This material was used without further purification. GC: column SP, Rt:11.1 for 12,12-diethoxydodec-1-yne 4 (<3 Area %) and Rt: 16.8 for16,16-diethoxyhexadeca-3,5-diyne 6. ¹H NMR (CDCl₃, 300 MHz): δ 4.48 (t,J=5.85, 1H), 3.6 (m, J=7.10 Hz, 2H), 3.5 (m, J=7.10 Hz, 2H), 2.26 (m,J=7.50 Hz, 2H), 1.6 (m, 2H), 1.5 (m, 2H), 1.4-1.25 (br, 12H), 1.20 (t,J=7.05 Hz, 6H), 1.15 (t, J=7.50 Hz, 3H).

Example 1 Step F

To a solution of cyclohexene (10.6 ml, 104.84 mMol, 99%, Su: J-StarResearch) in THF (20 ml {+/−0.2 ml}, distilled, Su: Pharmco/AAPER) wasadded DEANB (9.1 ml, 51.39 mMol, Su: Aldrich) at ˜5° C. under a blanketof N₂. After 2 hr stirring, 16,16-diethoxyhexadeca-3,5-diyne 6 (6.3 g,20.56 mMol Su: from Step E) was charged while maintaining temperature˜5° C. Solution was monitored ˜2.5 hrs at ˜5° C. until clear. Solutionwas stirred 4 hr at ambient temperature. The solution was monitored byGC for the consumption of compound 6 (compound 6<2.0 Area % by GC).Glacial acetic acid (15.0 ml, 261 mMol, ACS grade, Su: Pharmco/AAPER)was charged. The solution was monitored after 4 hr stirring at ambienttemperature until colorless. Aqueous sulfuric acid (100 ml, 4.0 M, Su:Aldrich) was charged, and the resulting solution was stirred at 60° C.for 2 hrs. After cooling to ambient temperature, the solution wasextracted with heptane (2×100 ml). The combined organic layers werewashed with H₂O (100 ml) and saturated NaHCO₃(aq) (100 ml, Su: J-StarResearch), respectively. A crude product (9.5 g) was obtained aftersolvent removal. This crude product was re-dissolved in heptane (100 ml)and stirred with H₂O (100 ml). After 4 hr stirring and phase separation,the organic layer was filtered through a pad of silica gel (6.3 g,gravity grade, Su: Silicycle) and concentrated to give crude compound 7(5.4 g, 83% yield). Vacuum distillation gave compound 7 (1.55 g, 32%yield for this step) at 129˜130° C./0.65 mmHg. GC: column SP, Rt: 14.3min for (11Z,13,Z)-11,13-hexadecadien-1-al 7, 16.8 min for16,16-diethoxyhexadeca-3,5-diyne 6 (<3 Area %) shown in FIG. 4. ¹H NMR(CDCl₃, 300 MHz): δ 9.77 (t, J=1.95 Hz, 1H), 6.23 (m, 2H), 5.44 (m, 2H),2.42 (dt, J=7.27, 1.80 Hz, 2H), 2.18 (m, 4H), 1.63 (m, J=7.35 Hz, 2H),1.4-1.25 (broad, 12H), 1.00 (t, J=7.50 Hz, 3H).

Compound 7 obtained by the above synthesis was found to be identical toa standard navel orangeworm pheromone (Z,Z)-11,13-hexadecadien-1-al CASnumber 71317-73-2 by GC shown in FIG. 5. and by ¹H NMR.

While the invention has been described in terms of various embodiments,preferred embodiments, specific embodiments, specific examples, andapplications thereof, the invention should be understood as not beinglimited by the foregoing detailed description, but as being defined bythe appended claims and their equivalents. Numerous modifications andvariations could be made thereto by those skilled in the art withoutdeparting from the scope of the invention set forth in the claims.

What is claimed is:
 1. A method for synthesizing a sex attractantpheromone comprising: producing a compound of formula Y′—R¹—X (2) fromoxidation reaction on a compound of formula Y—R¹—X (1); producing acompound of formula

from acetalization reaction on said compound of formula (2); andproducing a final compound of formula R³—R⁷—R¹—Y′ (7) from a reductionreaction and a hydrolysis reaction on an initial compound of formula

wherein: X is halogen, Y is —OH, Y′ is ═O, R¹ is [—CH₂—]_(m), or alkyl,R³ is CH₃—[CH₂]_(n)—, or alkyl, R⁶ is [—C≡C—]_(q), or alkynyl, R⁷ is—C═C—C═C—, alkenyl, or R⁸, W is —O-alkyl, —O—R³, or —O—CH₂—CH₃, R⁸ isthe geometric cis configuration represented by structure

m is independently 5, 6, 7, 8, 9, 10, 11 or 12, n is independently 1, 2or 3, and q is independently 1 or
 2. 2. The method of claim 1, whereinsaid oxidation reaction on said compound of formula (1) is a TEMPOoxidation.
 3. The method of claim 1, wherein said oxidation reaction onsaid compound of formula (1) is a chromium-mediated oxidation.
 4. Themethod of claim 1, wherein said reaction on said compound of formula (2)is carried out using suitable diluents.
 5. The method of claim 1,wherein said reaction on said compound of formula (2) is carried outusing suitable reagents.
 6. The method of claim 1, wherein said reactionon said compound of formula (2) is carried out using an acid catalyst.7. The method of claim 1, wherein said compound of formula (6) isproduced by a process comprising: alkylation reaction on said compoundof formula (3) to produce a compound of formula

(4); and reaction of a formula (5b)

with said compound of formula (4)

using oxidative additions and reductive eliminations to produce saidcompound of formula (6), wherein: X′ is halogen, R² and R⁴ are —C≡CH,alkynyl, R⁵ is [—C≡C—]_(p), or alkynyl, and p is independently 1 or 2.8. The method of claim 7, wherein said compound of formula (5b) isproduced from a substitution reaction with compound of formula (5a)


9. The method of claim 7, wherein said compound of formula (6) isproduced by a process comprising: alkylation reaction on said compoundof formula (3) to produce a compound of formula

(4); and Cadiot-Chodkiewicz reaction of a formula (5b)

with said compound of formula (4)

to produce said compound of formula (6), wherein: X is halogen, R² andR⁴ are —C≡CH, alkynyl, and R⁵ is [—C≡C—]_(p), or alkynyl.
 10. The methodof claim 1, wherein said compound of formula (6) is produced by aprocess comprising: nucleophilic addition reaction of said compound offormula (3) with a compound of formula (8b)

to produce said compound of formula (6); wherein: R⁵ is [—C≡C—]_(p), oralkynyl, R¹⁰ is ≡C⁽⁻⁾, carbon anion, or de-protonated carbon, M is ametal, sodium, lithium, potassium, or magnesium, wherein M and R¹⁰together may form a salt.
 11. The method of claim 10, furthercomprising: reaction of compound of formula (8a)

using triple bond migration rearrangement to produce said compound offormula (8b); wherein: R⁹ is —CH₃, or alkyl.
 12. The method of claim 10,wherein said reaction of said compound of formula (3) with said compoundof formula (8b) is carried out using suitable diluents.
 13. The methodof claim 10, wherein said reaction of said compound of formula (3) withsaid compound of formula (8b) is carried out using suitable reagents.14. The method of claim 1, wherein said reaction on said compound offormula (6) to produce said final compound of formula (7) is carried outusing various diluents.
 15. The method of claim 1, wherein said reactionon said compound of formula (6) to produce said final compound offormula (7) is carried out using various reagents.